ADD_SUBDIRECTORY(app)
ADD_SUBDIRECTORY(graphics)
ADD_SUBDIRECTORY(input)

IF(BULLET_FOUND)
    ADD_SUBDIRECTORY(physics)
ENDIF(BULLET_FOUND)

IF(OPENAL_FOUND)
    ADD_SUBDIRECTORY(audio)
ENDIF(OPENAL_FOUND)

ADD_SUBDIRECTORY(ai)
